JP5242410B2 - Ophthalmological measurement system and method for determining ocular biometric data - Google Patents
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- 238000005259 measurement Methods 0.000 title claims description 63
- 238000000034 method Methods 0.000 title claims description 42
- 230000003287 optical effect Effects 0.000 claims description 25
- 238000011156 evaluation Methods 0.000 claims description 18
- 230000001427 coherent effect Effects 0.000 claims description 13
- 238000000691 measurement method Methods 0.000 claims description 8
- 238000001356 surgical procedure Methods 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 claims description 6
- 238000002604 ultrasonography Methods 0.000 claims description 5
- 230000004323 axial length Effects 0.000 claims description 4
- 230000000007 visual effect Effects 0.000 claims description 3
- 210000001508 eye Anatomy 0.000 claims 7
- 210000005252 bulbus oculi Anatomy 0.000 claims 1
- 238000002054 transplantation Methods 0.000 claims 1
- 238000012014 optical coherence tomography Methods 0.000 description 8
- 208000002177 Cataract Diseases 0.000 description 4
- 210000002159 anterior chamber Anatomy 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 210000004087 cornea Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 210000001519 tissue Anatomy 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000004304 visual acuity Effects 0.000 description 2
- 206010003210 Arteriosclerosis Diseases 0.000 description 1
- 208000037260 Atherosclerotic Plaque Diseases 0.000 description 1
- 206010024214 Lenticular opacities Diseases 0.000 description 1
- 206010038848 Retinal detachment Diseases 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 210000002615 epidermis Anatomy 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
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- 238000000386 microscopy Methods 0.000 description 1
- 231100000915 pathological change Toxicity 0.000 description 1
- 230000036285 pathological change Effects 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- 238000003325 tomography Methods 0.000 description 1
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- A61B3/102—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for optical coherence tomography [OCT]
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Description
本発明は、眼の生体計測法データを決定することのできる眼科学測定システムに関する。 The present invention relates to an ophthalmologic measurement system capable of determining ocular biometric data.
眼の生体計測法データを決定するためには、一連の公知の方法および測定機器がある。
例えば、レンズの混濁（白内障）がある場合に、水晶体を交換するための手術処置の前に、眼のさまざまな生体計測法パラメータを決定することが必要である。手術後にできる限り最適な視力を保証するために、これらのパラメータを相応の高い精度で決定する必要がある。求められた測定値に基づく適切な置換レンズの選択は、確立された方程式および算出法に基づき行われる。
For example, if there is lens opacity (cataract), it is necessary to determine various biometric parameters of the eye prior to the surgical procedure to replace the lens. In order to ensure the best possible visual acuity after surgery, these parameters need to be determined with reasonably high accuracy. The selection of an appropriate replacement lens based on the determined measured value is made based on established equations and calculation methods.
求めるべき最重要なパラメータは、特に軸長（網膜までの距離）、角膜曲率および角膜屈折力ならびに前房長さ（水晶体までの距離）である。これらの測定値は前後してさまざまな眼科学の機器で、または特別に最適化された生体計測法測定機器の助けにより得られることができる。 The most important parameters to be determined are in particular the axial length (distance to the retina), corneal curvature and corneal refractive power and anterior chamber length (distance to the lens). These measurements can be obtained back and forth with various ophthalmic instruments or with the help of specially optimized biometric measuring instruments.
これらのパラメータを求めるために、特に超音波測定機器および光学測定機器が短コヒーレント法に基づき普及している。 In order to obtain these parameters, ultrasonic measuring instruments and optical measuring instruments are particularly popular based on the short coherent method.
超音波機器の場合、いわゆる「Ａスキャン」原理または「Ｂスキャン」原理で動作する２つの異なる実施形がある。Ａスキャンは軸方向での測定のみを備え、一方Ｂスキャンでは横方向での付加測定が行われる。超音波法は原理的に直接眼に接触することを要求する。 In the case of ultrasound equipment, there are two different implementations that operate on the so-called “A-scan” principle or “B-scan” principle. The A scan includes only measurement in the axial direction, while the B scan performs additional measurement in the horizontal direction. The ultrasonic method in principle requires direct contact with the eye.
ＤＥ ４２ ３５ ０７９ Ｃ２において、眼を、特にヒトの眼を検査するための装置が記述されており、これは本質的に円錐台形のホルダで、眼に適合する形を示し、内部で音響（超音波）信号を評価するための探針(proｂe)を使用する。ここで探針はホルダの中軸に対して傾斜配置されており、パルス型の信号を送信するためにも受信するためにも適合している。 In DE 42 35 079 C2, a device for inspecting the eye, in particular the human eye, is described, which is essentially a frustoconical holder, shows a shape that fits the eye, and is internally acoustic (super Use a probe to evaluate the sound signal. Here, the probe is inclined with respect to the central axis of the holder, and is suitable for both transmitting and receiving pulse-type signals.
超音波機器を用いて眼の生体計測法データを決定することに固有の短所は、一方ではより精度の悪いこと、他方では眼に直接接触する必要性にある。このとき測定値は眼を窪ませることによって品質が悪くなり得る。水で満たされて眼の上に置かれた漏斗を通じて超音波波動が眼の中に導かれる液浸運用を使用することによって、この短所はたしかに軽減はされるが、しかしこの測定法の主要短所はなお残る。 The disadvantages inherent in determining ocular biometric data using ultrasound equipment are that it is less accurate on the one hand and needs to be in direct contact with the eye on the other hand. At this time, the quality of the measured value may be deteriorated by dipping the eye. This disadvantage is certainly alleviated by using an immersion operation in which ultrasonic waves are guided into the eye through a funnel filled with water and placed on the eye, but the main disadvantage of this measurement method. Still remains.
これは一方では、常に感染を媒介する危険をはらむ眼への直接接触が必要であり、他方では測定値決定のために眼を麻酔させることが必要であることです。置換レンズを正しく選択するためには、生体計測法データを決定する際に眼の視軸が相応に視準されていることが保証されねばならない。このためには超音波機器では視軸の視準が自動的には行われないから、特殊手段が設けられねばならない。 This means, on the one hand, that it is always necessary to have direct contact with the eye at risk of mediating infection, and on the other hand it is necessary to anesthetize the eye in order to determine the measured value. In order to select the replacement lens correctly, it must be ensured that the visual axis of the eye is collimated accordingly when determining biometric data. For this purpose, since the collimation of the visual axis is not automatically performed in ultrasonic equipment, special means must be provided.
音響信号に基づき構造推移の画像が再構成される超音波機器に似て、光学測定機器でも短コヒーレント法の基盤で構造推移の光学画像が２次元深部断面画像として表示される。
ここで短コヒーレント測定法としては、いわゆるＯＣＴ法（ＯＣＴ＝オプティカル・コヒーレンス・トモグラフィ）が普及しており、これの場合時間的に非コヒーレントな光が干渉計の助けにより反射・散乱材質を距離測定するために使用される。
Similar to an ultrasonic device in which an image of a structural transition is reconstructed based on an acoustic signal, an optical image of a structural transition is displayed as a two-dimensional deep cross-sectional image on the basis of a short coherent method even in an optical measurement device.
Here, as a short coherent measurement method, the so-called OCT method (OCT = optical coherence tomography) is widely used, and in this case, the non-coherent light is separated from the reflection / scattering material with the help of the interferometer. Used to measure.
ＯＣＴ法の原理は、白色光干渉計法に基づき、信号の継続時間を干渉計（多くはマイケルソン干渉計）の助けにより比較する。このとき、アームは知られた光学的行程（標準アーム）を用いて測定アームのための標準として引用される。両方のアームからの信号の干渉は、相対的光学行程をＡスキャン（個別の深度信号）内部で読み出すことのできる型を作り出す。このとき１次元ラスタ法では、光線は、超音波技術に類似に１方向または２方向を横切って導かれ、これを用いて面的なＢスキャンまたは３次元トモグラフィ（Ｃスキャン）が取り入れられる。ここで個別Ａスキャンの振幅値は、対数化されたグレースケールまたは疑似カラー値で表示される。たとえば、１００回の個別Ａスキャンから成る１回のＢスキャンについて、１秒の測定時間が必要である。 The principle of the OCT method is based on the white light interferometer method, which compares the signal duration with the help of an interferometer (mostly a Michelson interferometer). At this time, the arm is cited as a standard for the measuring arm using a known optical path (standard arm). Interference of signals from both arms creates a mold in which the relative optical stroke can be read out inside an A-scan (individual depth signal). In this case, in the one-dimensional raster method, the light beam is guided across one or two directions, similar to the ultrasonic technique, and a plane B-scan or three-dimensional tomography (C-scan) is used. Here, the amplitude value of the individual A scan is displayed in logarithmic gray scale or pseudo color value. For example, a measurement time of 1 second is required for one B-scan consisting of 100 individual A-scans.
ＯＣＴ法の測定分解能は、使用された光源のいわゆるコヒーレント長によって決定され、典型的には約１５μｍである。これの光学的透明な媒質を検査するための特性に基づき、本方法は眼科学において広く拡大されている。
眼科学において使用されるＯＣＴ法では、異なる２つのタイプが普及している。測定値を決定するためには、参照アームの第１のタイプで長さが変更され、ここでスペクトルは考慮されることなく、連続的に干渉の強度が測定される。この方法は「タイムドメイン法」と名づけられる。
The measurement resolution of the OCT method is determined by the so-called coherent length of the light source used and is typically about 15 μm. Based on its properties for examining optically transparent media, the method has been widely expanded in ophthalmology.
Two different types of OCT methods used in ophthalmology are prevalent. To determine the measurement value, the length is changed with the first type of reference arm, where the intensity of interference is continuously measured without considering the spectrum. This method is named “time domain method”.
他の「フリークェンシードメイン法」と名づけられる方法では、これに反してスペクトルの測定値を決定するためにスペクトルが考慮され、個別のスペクトル成分の干渉が把握される。それゆえ、一方では時間領域（タイムドメイン）における信号の、また他方では周波数領域（フリークェンシードメイン）における信号の話となる。
「フリークェンシードメイン」の長所は、容易でかつ迅速な同時測定にあり、さらに深度に関する完全な情報が移動部分に注意せずに求めることができる。このことは安定性および速さを大きくする。
On the other hand, in the method named “Frequency Domain Method”, the spectrum is considered in order to determine the measured value of the spectrum, and the interference of the individual spectral components is grasped. Therefore, on the one hand it is a signal in the time domain (time domain) and on the other hand it is a signal in the frequency domain (frequency domain).
The advantage of “Frequency Domain” lies in easy and rapid simultaneous measurement, and complete depth information can be obtained without paying attention to the moving part. This increases stability and speed.
ＯＣＴの大きな技術的長所は横方向の分解能により深度分解能を結合することである。顕微鏡法と反対に、これによって検査すべき対象の３次元構造を把握することができる。純粋に反射することによって非接触である測定が、生組織（インビボ）の顕微鏡画像の作出を可能とする。 A major technical advantage of OCT is that it combines depth resolution with lateral resolution. Contrary to microscopy, this makes it possible to grasp the three-dimensional structure of the object to be examined. Measurements that are non-contact by pure reflection allow the creation of microscopic images of living tissue (in vivo).
高い作動原理の選択性に基づき、非常に弱い信号（ナノワット未満）が検出でき一定の深度に割り当てることができるので、この方法は微感度組織を検査するのに適合している。ＯＣＴ法の使用は、検査すべき対象に電磁放射が、波長に依存して進入する深度ならびに帯域幅に依存する分解能によって縮減させられる。 Based on the selectivity of the high operating principle, this method is suitable for examining sensitive tissues, since very weak signals (less than nanowatts) can be detected and assigned to a certain depth. The use of the OCT method is reduced by a resolution that depends on the depth as well as the bandwidth at which electromagnetic radiation enters the object to be examined.
今日通常の生体計測法の測定機器では、測定値は機器内で処理され、使用されるべき交換レンズについての提案が提起される。これは算出に使用された方程式および使用可能な（製造条件付きの）レンズのタイプに依存する。
手術の際の個人的な影響並びに使用された測定技術を考慮するために、手術後の結果が算出方程式中の定数を最適化することについて影響を与えるようにさせる可能性もしくは必要性がある。すべての測定値、データおよび方程式がデータバンクおよびソフトウェアプログラムの中で管理され、解析され、保存される。部分的にはこれらの解はネットワーク内で総合され、これらを用いて何倍もの広い利用が結び付けられることができる。
In today's normal biometric measuring instruments, the measured values are processed in the instrument and suggestions are made for interchangeable lenses to be used. This depends on the equation used for the calculation and the type of lens available (with manufacturing conditions).
There is a possibility or need to have post-operative results have an impact on optimizing the constants in the calculation equation in order to take into account the personal impact during the surgery as well as the measurement technique used. All measurements, data and equations are managed, analyzed and stored in databanks and software programs. In part, these solutions are combined in the network and can be used to connect many times as many uses.
短コヒーレント法による光学測定機器では、デュアルビーム法に従う干渉計原理が利用される。この方法は非接触であり、今日最も高い精度で動作する。この測定原理に基づく解法は、たとえばＤＥ １９８ １２ ２９７ Ｃ２， ＤＥ １０３ ６０ ５７０ Ａ１およびＷＯ ２００４／０７１２８６ Ａ１に記述されている。 The optical measuring instrument using the short coherent method uses the interferometer principle according to the dual beam method. This method is contactless and operates with the highest accuracy today. Solutions based on this measurement principle are described, for example, in DE 198 12 297 C2, DE 103 60 570 A1 and WO 2004/071286 A1.
超音波機器のところで挙げられた短所は、光学的方法によって回避され、特に高精度であり（干渉計）、患者にやさしい性質が高められる。しかし短所としては、たとえば重い白内障の場合、散乱が測定信号を非常に弱め、レーザ電力が停止されねばならない眼の極限値まで自由に高めることができないから、患者の約１０ないし２０パーセントが測定不能となることが実証されている。この場合は、患者が固定点をもはや知覚することができず、測定が困難となることもある。 The disadvantages mentioned in the case of ultrasound equipment are avoided by optical methods and are particularly high precision (interferometer) and enhance patient-friendly properties. However, the disadvantage is that, for example, in the case of severe cataracts, about 10 to 20 percent of patients are not measurable because scatter greatly weakens the measurement signal and the laser power cannot be increased freely to the limit of the eye where it must be stopped. It has been proven that In this case, the patient can no longer perceive the fixed point and the measurement may be difficult.
加えて両方の方法では、決まった病理学的な変更の場合に、測定値獲得の際に個々の問題に至ることがあり得る。これらのネガティブな影響の結果として、測定上に適切な交換レンズを選択する際の誤差決定についての危険が持ち上がる。 In addition, both methods can lead to individual problems in obtaining measurements in the case of certain pathological changes. As a result of these negative effects, there is a risk of determining errors in selecting an appropriate interchangeable lens for measurement.
本発明には、従来技術の短所が回避され、眼の生体計測法測定データが困難な条件下でも高い信頼性および精度をもって求められることのできる解決法を開発するという課題が根底にある。 The problem underlying the present invention is to develop a solution that avoids the disadvantages of the prior art and that can be obtained with high reliability and accuracy even under conditions where eye biometric measurement data is difficult.
本発明により、本課題は独立請求項の特徴によって解決される。優遇される別の製作および構成が従属請求項の対象である。 According to the invention, this problem is solved by the features of the independent claims. Other productions and configurations which are favored are subject to the dependent claims.
本技術的解決法は、眼の生体計測法データを求めるために、交換または付加レンズまたは屈折処置の手術前の決定の視野内で設けられており、ここで測定値は困難な条件下でも高い信頼性および精度をもって求めることができる。加えて提案される解決法を用いて、前室および水晶体の位置、ヒトの眼の角膜の前面の形（角膜計測定）ならびに角膜の厚さ（検厚器測定）が決定できる。 This technical solution is provided within the field of view for pre-operative determination of interchangeable or additional lenses or refractive procedures to determine ocular biometric data, where the measurements are high even under difficult conditions It can be determined with reliability and accuracy. In addition, the proposed solution can be used to determine the location of the anterior chamber and the lens, the shape of the anterior surface of the cornea of the human eye (keratometer measurement) and the thickness of the cornea (thickness meter measurement).
本発明は以下に実施例に基づきより詳しく記述される。 The invention is described in more detail below on the basis of examples.
本発明にかかる交換または付加レンズまたは屈折処置を手術前に決定する視野内で眼の生体計測法データを求めるための眼科学測定システムは、超音波による測定機器ならびに光学的測定機器および評価ユニットの組み合わせから成る。ここで評価ユニットにより眼の生体計測法データを求めるために、光学的および／または超音波測定機器の測定値が使用される。 An ophthalmologic measurement system for obtaining ocular biometric data in a field of view that determines an interchangeable or additional lens or refractive procedure prior to surgery according to the present invention comprises an ultrasonic measuring instrument, an optical measuring instrument and an evaluation unit. Composed of a combination. Here, the measurement values of the optical and / or ultrasonic measuring device are used for obtaining the biometric data of the eye by the evaluation unit.
ここで、光学的測定機器としてはシャインプフルーク・カメラ、すなわちたとえば、ＩＯＬマスター（カール・ツァイス・メディテク株式会社）のような短コヒーレント法による光学測定機器が使用できる。 Here, as the optical measuring instrument, a Scheimpflug camera, that is, an optical measuring instrument based on a short coherent method such as an IOL master (Carl Zeiss Meditech Co., Ltd.) can be used.
シャインプフルーク・カメラを用いて眼の前方部分図の２−Ｄ画像が作り出され、眼のこの領域における間隔が測定でき、一方ＩＯＬマスターは軸長、前房深度および角膜屈折力を正確に決定するために用いることができる。 A 2-D image of the anterior segment of the eye is created using a Scheimpflug camera to measure the spacing in this region of the eye, while the IOL master accurately determines axial length, anterior chamber depth and corneal power Can be used to
長所を持つ技術的構築において、評価ユニットにより得られる両測定機器の測定値が相手側の較正をするために利用され、ここで特に標本眼が使用される。これのために必要な測定値の引き渡しは、主として評価ユニットが両測定機器に接合しているデータ接続を通じて行われる。 In a technical construction with advantages, the measured values of both measuring instruments obtained by the evaluation unit are used to calibrate the other party, in particular the specimen eye. The transfer of the measurement values necessary for this takes place mainly via a data connection in which the evaluation unit is joined to both measuring instruments.
別の技術的構築においては、両測定機器を、眼科学測定システムがコンパクトでかつより良く操作可能となるような機器内に一体化している。このことはさらに、ＰＣ、モニタならびに入出力ユニットのような決まったシステムを共通に利用することができる長所を有する。 In another technical construction, both measuring instruments are integrated into an instrument that makes the ophthalmological measuring system compact and better operable. This further has the advantage that certain systems such as PCs, monitors and input / output units can be used in common.
図１に提示された、超音波による測定機器１（前方および／または後方の眼の区分を表示するための音響画像を作る方法）および短コヒーレント法による光学的測定機器２（前方および／または後方の眼の区分を表示するための光学画像を作る方法）の組み合わせは、ここで特に長所を持つ眼科学測定システムを提示する。ここで光学的測定機器２としては特にカール・ツァイス・メディテク株式会社のＩＯＬマスターが使用される。この眼科学測定システムを用いて、期待されないまたは明白でない結果を包含する所見もしくは解明が可能となる。とりわけ評価ユニット３により、得られた測定値から検査される眼の２Ｄまたは３Ｄ表示が求められ、評価される。これのために要求される測定値の引き渡しは、評価ユニット３が、両測定機器１および２に接続しているデータ接続４を通じて行われる。 The ultrasonic measuring device 1 (method for creating an acoustic image for displaying the front and / or rear eye segment) and the optical measuring device 2 (front and / or rear) by the short coherent method presented in FIG. The combination of the method of creating an optical image for displaying a segment of the eye presents here an ophthalmic measurement system with particular advantages. Here, as the optical measuring device 2, an IOL master of Carl Zeiss Meditech Co., Ltd. is used in particular. With this ophthalmological measurement system, findings or elucidations involving unexpected or unclear results are possible. In particular, the evaluation unit 3 determines and evaluates the 2D or 3D display of the eye to be examined from the measured values obtained. The measurement values required for this are delivered via a data connection 4 in which the evaluation unit 3 is connected to both measuring devices 1 and 2.
これとは反対に、図２は超音波ならびに短コヒーレント法による光学的測定機器が一体化されている眼科学測定システムを示す。 On the other hand, FIG. 2 shows an ophthalmologic measurement system in which an optical measuring instrument using ultrasonic and short coherent methods is integrated.
眼科学測定システムにより求められる眼の生体計測法データは、長所をもつ仕方で交換または付加レンズまたは、たとえば手術顕微鏡のような他の取り扱いに後置された機器への屈折処理を手術前に決定する視野内で進められることができる。 Ocular biometric data required by an ophthalmological measurement system is determined in an advantageous manner prior to surgery for refraction processing to an interchangeable or additional lens or other post-equipment such as a surgical microscope Can be advanced within the field of view.
本発明にかかる交換または付加レンズまたは屈折処理を手術前に決定する視野内で眼の生体計測法データを求めるための方法では、超音波による測定機器のおよび／または光学的測定機器の測定値が評価ユニットに送られ、これから評価ユニットにより内移植すべきレンズのパラメータが公知の方程式および算出法に基づき求められる。 In the method for determining ocular biometric data in the field of view in which an interchangeable or additional lens or refraction process is determined prior to surgery according to the present invention, the measurement values of the ultrasonic measuring device and / or the optical measuring device are measured. The parameters of the lens to be implanted by the evaluation unit are determined based on known equations and calculation methods.
評価ユニットに基づき両測定機器の測定値により求められた生体計測法データは交互に比較される。このことは、可能な誤差測定が知られ補正されることができるという長所をもつ。現在ある両測定機器間の比較的大きい差では、誤差を伴う測定結果についての原因を求めることのできるよう、眼の２Ｄ表示を作り上げることが常に有意義である。このような差異について可能性のある原因は網膜剥離または葡萄腫であり得る。また、偽表皮鉤眼の場合にもアーチファクトがさまざまな測定法で現れて、これが誤って説明されると誤差を伴う測定結果に導き得る。
The biometric data obtained from the measurement values of both measuring devices based on the evaluation unit are compared alternately. This has the advantage that possible error measurements can be known and corrected. With a relatively large difference between both existing measuring instruments, it is always meaningful to create a 2D display of the eye so that the cause for the measurement result with errors can be determined. Possible causes for such differences may be retinal detachment or atheroma. Artifacts also appear in various measurement methods in the case of false epidermis, and if this is mistakenly explained, it can lead to measurement results with errors.
さらに、得られた両測定機器の測定値を交互の較正をするために利用することは、安全性および精度を高めるのに有利であり、この場合主としてマスター眼が使用される。また、得られた両測定機器の測定値もレンズ定数を最適化するために使用されることができる。 Furthermore, utilizing the obtained measurement values of both measuring instruments for the alternate calibration is advantageous for increasing safety and accuracy, in which case the master eye is mainly used. Also, the obtained measurement values of both measuring instruments can be used to optimize the lens constant.
本方法の別の構築においては、２基の分離された測定機器の測定データがそれぞれの測定機器の評価ユニットにより再処理され、測定結果がデータ接続を通じてそれぞれ他の測定機器に引き渡される。 In another construction of the method, the measurement data of the two separate measuring instruments are reprocessed by the evaluation unit of each measuring instrument and the measurement results are passed to each other measuring instrument via the data connection.
本発明にかかる解決法を用いて、眼科学測定システムおよび眼の生体計測法データを求めるための方法が使用に供され、これを用いて測定値を困難な条件下でも高い信頼性および精度をもって求めることができる。組み合わせによって現在あるさまざまな測定法の固有の短所が、これらの長所を失うことなく少なくとも部分的に補償される。対応して非接触で測定値を求める際の非常に高い光学測定法の精度も、たとえば重い白内障のような困難な条件下で超音波による測定法による使用可能性も同様に保たれたままである。両方法の測定値を比較することによって、測定値の信頼性および精度が付加的に高めることができる。 Using the solution according to the present invention, an ophthalmological measurement system and a method for obtaining ocular biometric data are provided for use, with which the measured value can be obtained with high reliability and accuracy even under difficult conditions. Can be sought. The combination compensates at least partially for the inherent disadvantages of the various measurement methods currently present without losing these advantages. Correspondingly, the very high accuracy of optical measurement methods for non-contact measurement, as well as the applicability of ultrasonic measurement methods under difficult conditions, such as heavy cataracts, remains the same. . By comparing the measured values of both methods, the reliability and accuracy of the measured values can be additionally increased.
それゆえ、さまざまな測定システムの組み合わせは、測定個所において患者を完全に検査し、もしくは所見をすることを可能とするから、患者は移転させられる必要もなく、さらにくり返し予約での測定も必要でない。 Therefore, the combination of various measurement systems allows the patient to be fully examined or made observations at the measurement site, so that the patient does not need to be relocated and does not require repeated appointments .
多数のさまざまな眼の生体計測法データを求めることによって、患者の視力の特性を改善することが可能となり、このことから導き出される置換レンズまたは屈折付加レンズがより安全となる。 By obtaining a large number of different eye biometric data, it is possible to improve the characteristics of the patient's visual acuity, and the replacement lens or refractive addition lens derived therefrom is more secure.
１ 超音波による測定機器
２ 短コヒーレント法による測定機器
３ 評価ユニット
４ データ接続
1 Ultrasonic measuring instrument 2 Short coherent measuring instrument 3 Evaluation unit 4 Data connection
Claims (11)
前記評価ユニット（３）により眼の生体計測法データを求めるために、光学測定機器（２）および／または超音波による測定機器（１）の測定値とが使用され、比較され、補正される眼科学測定システム。 Measuring device (1) using ultrasound and optical measuring device for determining the axial length of the eye for obtaining the biometric data of the eye within the visual field for determining the replacement or transplantation additional lens or the lens to be refracted before surgery An ophthalmological measurement system comprising a combination of (2) and an evaluation unit (3) coupled to the ultrasonic measurement device (1) and the optical measurement device (2) ,
In order to obtain the biometric data of the eye by the evaluation unit (3), the measured values of the optical measuring device (2) and / or the measuring device (1) using ultrasound are used , compared and corrected. Scientific measurement system.
超音波による測定機器（１）および／または眼の軸長を決定する光学測定機器（２）からの測定値が、結合されて評価ユニット（３）に送られ、
そして評価ユニット（３）が、眼球内移植すべきレンズのパラメータを、HOLLADAY（ホラディ）、Hoffer（ホッファー）、Haigis、SRK Shammasのような公知の方程式および算出法に基づき決定し、そしてその数値が互いに比較され、補正される眼科学測定方法。 To determine ocular biometric data in the field of view to determine the replacement or implanted additional lens or lens to be refracted prior to surgery,
Measurement values from the ultrasonic measuring device (1) and / or the optical measuring device (2) for determining the axial length of the eye are combined and sent to the evaluation unit (3),
The evaluation unit (3) then determines the parameters of the lens to be implanted in the eye based on known equations and calculation methods such as HOLLADAY, Hoffer, Haigis, SRK Shammas , and the numerical values Ophthalmological measurement methods that are compared and corrected for each other .
The measurement data of the two separated measuring devices (1, 2 ) is further processed by the evaluation unit (3) of each measuring device (1 or 2), and the measurement results are transmitted to the other through the data connection (4). The method according to one of claims 7 to 10, wherein the method is delivered to a measuring device (2 or 1).
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| DE102005062238A DE102005062238A1 (en) | 2005-12-22 | 2005-12-22 | Ophthalmological measurement system for measuring biometric eye data has evaluation unit that uses measurement values of optical measurement device and/or ultrasonic measurement device to determine biometric data of an eye |
| PCT/EP2006/011537 WO2007079835A1 (en) | 2005-12-22 | 2006-12-01 | Ophthalmological measuring system and method for determining biometric data of an eye |
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| JP5242410B2 true JP5242410B2 (en) | 2013-07-24 |
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| US7794082B2 (en) | 2010-09-14 |
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| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |